What is been a fan?

When someone that CLAIMS they DON'T like you but know EVERYTHING about you and stay having your name in their mouth. They Been A Fan

Girl, you been a fan

been a fan - video

Been a fan is Nicki Minaj's term for a common ass hater that seems to know everything about you as a person but claims to dislike you

Oh Ebone's hatin' on me? Bitch been a fan!